<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>登录</title>
</head>
<body>
  <form action="/add" method="post">
    <input type="hidden" name="_csrf" value="<%= csrf %>">
    用户名：<input type="text" name="username" /><br/>

    密码：<input type="password" name="password" /><br/>
    <button type="submit">登录</button>
  </form>
</body>
</html>